81 x 9 = 801. What must you do to make the this equation true?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

In a town, there are over 100 flats.
Flat-1 is named first flat.
Flat-2 is named second flat.
Flat-3 is named third flat.

A visitors 'Victor' decides to walk through all the flats, he finds all the flats except flat-62.
Victor later founds that the local of the town have given it another name.

What is the name of the Flat?

Can it be possible to build a house that has all its four walls facing towards the South?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

How is a fly different from a mosquito?

What has hands, but can’t clap?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?